SPERMAPHYTES. 85 



4. Inside the stamens and forming the middle 

 of the flower, the pistil. 



II. The Calyx. 



Five green-pointed sepals attached around the 

 outer edge of the receptacle (expanded end 

 of flower-stalk). 

 Remove two sepals. Sketch. 



III. The Corolla. 



Consisting of five brightly colored parts, 

 petals. Observe that their insertion on 

 the receptacle alternates with that of the 

 sepals. 



Remove two or three petals. Sketch. 

 IY. The Stamens. 



Ten in number, each consisting of a stalk- 

 like part, the filament, terminated by a 

 small expanded part, the anther The 

 filaments are united along part of their 

 length. The anther consists of two lobes 

 or thecae, and a very narrow connective. 

 Sketch a stamen. 



Tease out an antlier in water and examine with 

 D2. 



Numerous pollen-grains will be found. 

 Sketch. 



Y. The pistil is surrounded by a tube formed by 

 the united filaments of the stamens. Take 

 the stamens off carefully. The lower two 

 thirds of the pistil is stout and green. The 



